Of course the \(\omega _\mu \)  meson interacts directly with nucleons
[1]}, [2]}, [3]}, [4]}, [5]}, [6]}.
The CBELSA/TAPS experiment found that the mass of the \(\omega _\mu \) 
does not shift significantly at nuclear densities
[7]}, [8]}, although its width is over thirty times larger than in vacuum
[9]}, [10]}, [11]}, [12]}, [13]}, [14]}.
This does not concur with QHD [1]}, [2]}, [3]} nor
Refs. [18]}, [19]}, [20]}, [21]}, [22]}, [23]}, [24]}, [25]}, [26]}, [27]}, [28]}, where the \(\omega _\mu \)  mass decreases by \(n_{\rm sat}\) .
